Why can't I find Entei in my FireRed Pokedex after having done all the requirements?

Question

I can't find Entei in my Pokedex. It stops at 229 Pokemon (Houndoom) in FireRed after having done all requirements.

Comments

Have you seen the wild Entei yet?

Answer 1

The Pokedex only lists Pokedex Entries up to the highest number you have seen. For example, at the start of the game in Route 1 if your only encounter is a Pidgey, it won't show Rattata even though it is available in the same route. On the other hand, If you encounter a Rattata, Pidgey's number will be displayed, though only as "-----".

The Pokedex stopping at Houndoom means you have not seen any Pokemon with the numbers beyond 229. When you see Entei in the wild, the list will expand to 244.

Comments

But where to see entei in the wild when i can't view in pokedex where it will appear

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Entei is a roaming Pokemon in FRLG, which means it can be found in any route that changes everytime you enter a new location. In case I'm wrong, anyone is free to correct me but the recommended way to hunt for them without the Pokedex is to have a Pokemon that under the level of the roaming Pokemon (in Entei's case, 50) but still over the level of the wild Pokemon in an area. When you use a repel, you won't see any regular wild Pokemon but you will encounter the roaming Pokemon. If there is no roamer, then you exit the route and reenter to check again.

Also just in case, you can only get Entei if you chose Bulbasaur as your starter.
https://bulbapedia.bulbagarden.net/wiki/Roaming_Pok%C3%A9mon#Kanto

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The first time you encounter Entei is *completely luck-based*. You can speed up that process by using the method described above by An Asocial Moth. After encountering it for the first time, it will appear on your pokedex, including its current location (which changes with each cutscene). You can then use the same method to encounter it again, but it will be easier as you'll know its precise location.

This goes for all three roaming legendaries. Also note that they'll use a move like Roar/Whirlwind to instantly end the battle, so your lead pokémon must be faster and must use a trapping move like Mean Look to have a chance at capturing them.